Thermona Therm 28 KD, Руководство по установке

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From what can be seen above it is clear that by means of the adjusting revolving knob that is used for setting-up
of the heating temperature on the control panel we can set the temperature of the heated environment at the
required level. The recommended value of the starting service setting is
“K” = 1.6.
The user setting of the
revolving regulator of the heating temperature is recommended in the medium position (the pointer pointing
upwards, i.e. the off-set of the curve equals to 0 °C). When you have checked the temperature of the heated
environment (such a check should take place after circa 24 hours), you can set the system according to your own
requirements. By the agency of the weather-compensated regulation the changes of the outside temperature will be
always compensated and the temperature of the heated environment will be automatically preserved at a constant
level.
By using this system of regulation we will achieve further decrease of operating costs while the heating comfort
will be undeniably improved (the heating elements are heated continuously). Last but not least, we will appreciate
this possibility as a pre-regulation of the primary heating circuit when using the zone regulation, mixing valves, etc.
It is, of course, possible to reduce the temperature of the heated environment by connecting a room thermostat to
the system. In this case we recommend the type without the PI regulation which is equipped only with a switching
mechanism working on the basis of temperature gaps. We set the temperature by the revolving regulator at a level
that is slightly higher than it would be for the operation without the room thermostat.
Should the sensor of outside temperature be working improperly, the malfunction will be immediately signalled
and the boiler will resume operation at the temperature level that was set in the previous mode (1.1 – heating mode
without weather-compensated regulation).
2. DHW through-flow heating mode (28KDC)
Setting:
Service switch DS1 – ON, DS2
as mentioned above
,
DS3 – OFF.
The operation phase of this mode begins by switching the DHW through-flow switch. The ventilator is put into
operation and the circulation pump and ignition automatics get activated. The mode ignites the boiler at the starting
power (circa 10 sec after the boiler’s ignition) and increases the boiler output at the maximum level so that the
outlet temperature that was previously set by the user can be achieved as soon as possible. This temperature is later
maintained by the output regulation of the PID type.
If two requirements should appear simultaneously, the heat-up of the DHW takes precedence over the heating.
3. Heating mode of the DHW supply tank (28KDZ)
Setting:
Service switch DS1 – OFF, DS2
as mentioned above
,
DS3 – OFF.
The operation phase of this mode is started by switching of the supply tank thermostat. The three-way valve’s
relay is activated and reset into the heating position. The relay of the pump and ignition automatics are activated
after circa 8 sec. The mode ignites the boiler at the starting power (2 sec after the boiler’s ignition) and increases
the boiler output at the maximum level so that the outlet temperature 80
o
C can be achieved as soon as possible.
This temperature is later maintained by output regulation of the PID type. Once the supply tank is heated, the
thermostat is disconnected and the heating in the boiler is stopped. After 10 sec the pump halts and stops the three-
way valve relay which sets it into the heating position. While the valve is being reset (circa 8 sec), any efforts to
ignite the boiler are blocked. When the re-setting is finished the boiler can resume heating of the system according
to the user’s requirements.
If two requirements should appear simultaneously, the heating-up of the DHW supply tank takes precedence
over the heating.
Additional functions:
∗
When the heating in the boiler stops, the ventilator keeps on working for 20 more seconds at the initial running
speed (the remaining flue is removed from the combustion chamber).
∗
The pump is regularly put into operation if the boiler is out of action (it is working for 30 sec if no operation
took place during the last 24 hours).
∗
The three-way valve is regularly switched (for 10 sec if no operation took place during the last 24 hours).
∗
The anti-frost protection is activated whenever the temperature in the boiler gets bellow 6
o
C. The three-way
valve is reset into the heating position (depending on the type of the particular boiler), the pump is put into
operation; the boiler is ignited and starts to heat the heating circuit up to 30
o
C. Once this temperature is
regained, the anti-frost protection is automatically switched off.